Pleasure itself is not a vice

True enjoyments also keep people from vice.

If misery be the effect of virtue, it ought to be reverenced; if of ill-fortune, to be pitied; and if of vice, not to be insulted, because it is perhaps itself a punishment adequate to the crime by which it was produced.

That friendship may be at once fond and lasting, there must not only be equal virtue on each part, but virtue of the same kind; not only the same end must be proposed, but the same means must be approved by both.